Device for operating sliding doors.



L. T. WEISS.

DEVICE FOR OPERATING SLIDING DOORS.

APPLICATION FILED OCT- 5. I9I6.

Patented Feb. 27, 1917.

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WITNESS INVENTOI? LOUIS T. WEISS, BROOKLYN, NEW YORK, ASSIGNOR TORELIANCE BALL BEARING DOOR HANGER COMPANY, OF NEW YORK, N. Y., ACQRPORATION OF NEW YORK.

DEVICE FOR OPERATING SLIDING DOORS.

Specification of Letters Patent.

Patented Feb. 27, 1917.

Application fiiea October 5, 1916. Serial No. 123,904..

To all whom it may concern:

Be it known that I, LoUIs T. Wnrss, a citi zen of the United States, andresiding in the borough of Brooklyn of the city of New York, county ofKings, in the State of New York, have invented certain new and usefulImprovements in Devices for Operating Sliding Doors, of which thefollowing is a specification, reference being had to the accompanyingdrawing, forming part hereof.

This invention relates to that class of devices for operating slidingdoors, particularly for elevators, in which the door is moved to itsclosed position by the action of a spring through a toggle lever, onemember of which is pivoted upon a relatively fixed point while the otheris pivoted upon the door, and in which, in the opening movement of thedoor, the toggle is first broken and the opening movement of the door iscontinued by the application of force to the door by the hand of theoperator. In some of such devices the operating handle has a limitedfree movement relative to the door, which limited free movement servesto break the toggle lock, and thereafter moves with the door to open thesame against the force of the toggle spring, acting through an abutmentcarried by the door. In other devices, old in the art, the operatinghandle has no such free movement for the purpose of breaking the toggle,followed by a movement with the door in which it acts against anabutment on the door but has a continuous movement relative to the doorthroughout the movement of the door, sometimes having been formed as anextension of one member of the toggle. The invention is concerned withdevices of the particular type last referred to and in accordancetherewith the operating handle, pivoted on the door, acts continuouslyupon a cam surface carried by one member of the toggle and throughoutthe opening movement of the door acts continuously to flex the togglemore and more. The invention will be more fully explained hereinafterwith reference to the accompanying drawing in which it is'illustratedand in which,

Figure 1 is a view in front elevation showing a portion of the slidingdoor and its support with the improved door operating devices. I

Fig. 2 is a top view of the door operating devices, the door and aportion of the well being shown in section. v

Fig. 3 is a detail view, on a largerscale than Fig. 1, showing therelation of the operating handle and the canton the toggle member. I

' In the embodiment of the invention shown in the drawing, the wall ahas secured thereto a track 6 on which is supported in any convenientmanner, as by a carrier 0, a sliding door 0. A door check a, of anysuitable construction, may be provided to cushion the closing movementof the door under the influence of the toggle spring. A toggle lever,

com risin the two members (Z and c has one member pivoted upon the door,as at d, and the other member pivoted, as at e,'in a bracket f securedto the wall and preferably provided with a lip f to limit the movementof the toggle in the closing movement of the door. A. coiled spring 9may be applied to the joint h of the toggle for the purpose of tendingalways to straighten the toggle and therefore to close the door. All ofthe parts thus far described may be formed and arranged to operate inany usual or suitable manner. p

The toggle member 03' is provided at some convenient point with a camsurface 6?, preferably on the upper side of an extension (Z beyond thepivot cl, and the operating handle is, pivoted on the door, as at 70, isadapted to cooperate with such cam surface, as through a roller kmounted on a pin Z0 The weight of the handle 70 keeps the roller 76always in contact with the cam surface d When the door is in its closedposition the parts occupy the relative positions shown by full lines inFigs. 1 and 2, with the roller 70 resting on the cam surface 6?. Whenthe door is to be opened the pressure of the operators hand upon theoperating handle is causes the roller 70 to act upon the toe of the camsurface (Z to break the toggle and continued pressure, also actingthrough the -roller upon the cam surface, produces a I claim as myinvention:

1. An operating device for sliding doors comprising a toggle having onemember pivoted upon a fixed point and the other mem ber pivoted upon thedoor, one of said members being formed with a cam surface, and anoperating handle cooperating with the cam surface on the toggle first tobreak the toggle and then by continued pressure to flex the togglefurther and open the door.

2. An operating device for sliding doors comprising a toggle having onemember pivoted upon a fixed point and the other member pivoted upon thedoor, one of said members being formed with a cam surface and extendedbeyond the pivot on the door, and an operating handle cooperating withsaid cam surface first to break the toggle and then by continuedpressure to flex the toggle further and open the door.

3. An operating device for sliding doors comprising a toggle having onemember pivoted upon a fixed point and the other mem- Copies of thispatent may be obtained for ber pivoted upon the door, one of saidmembers being formed with a cam surface, an operating handle cooperatingwith the cam surface on the toggle first to break the toggle and then bycontinued pressure to flex the toggle further and open the door, and aspring applied to the toggle to straighten the same.

4. An operating device for sliding doors comprising a toggle h ving onemember piv oted upon a fixed point and the other menu ber pivoted uponthe door, one of said members being formed with a cam surface, andextended beyond the pivot on the door, an operating handle cooperatingwith said cam surface first to break the toggle and then by continuedpressure to flex the toggle further and open the door, and a springapplied to the toggle to straighten the same.

'This specification signed this 29th day of September, A. D. 1916.

LOUIS T. WEISS.

five cents each, by addressing the Commissioner of Patents, Washington,D. 0.

